﻿<!DOCTYPE html>
<html>
<head>
  <title>Parallel Layout</title>
  <!-- Copyright 1998-2020 by Northwoods Software Corporation. -->
  <meta name="description" content="A custom Layout that arranges a collection of nodes and links where there is a single 'split' node and a single 'merge' node, and all nodes are in paths of links that come from the 'split' node and go to the 'merge' node." />
  <meta name="viewport" content="width=device-width, initial-scale=1">

  <script src="../release/go.js"></script>
  <script src="../assets/js/goSamples.js"></script>  <!-- this is only for the GoJS Samples framework -->
  <script src="ParallelLayout.js"></script>

  <script id="code">
    function init() {
      if (window.goSamples) goSamples();  // init for these samples -- you don't need to call this
      var $ = go.GraphObject.make;  // for conciseness in defining templates

      myDiagram =
        $(go.Diagram, "myDiagramDiv",  // must be the ID or reference to div
          {
            allowCopy: false,    // would need to merge copied nodes and links to
            allowDelete: false,  //   use the single "Split" and "Merge" nodes
            layout: $(ParallelLayout, { layerSpacing: 20, nodeSpacing: 10 })
          });

      // define the Node templates
      myDiagram.nodeTemplate =
        $(go.Node, "Auto",
          { locationSpot: go.Spot.Center },
          $(go.Shape, "Rectangle",
            { fill: "wheat", stroke: null, strokeWidth: 0 }),
          $(go.TextBlock, { margin: 3 },
            new go.Binding("text"))
        );

      myDiagram.nodeTemplateMap.add("Split",
        $(go.Node, "Auto",
          { locationSpot: go.Spot.Center },
          $(go.Shape, "Diamond",
            {
              fill: "deepskyblue", stroke: null, strokeWidth: 0,
              desiredSize: new go.Size(28, 28)
            }),
          $(go.TextBlock,
            new go.Binding("text"))
        ));

      myDiagram.nodeTemplateMap.add("Merge",
        $(go.Node, "Auto",
          { locationSpot: go.Spot.Center },
          $(go.Shape, "Circle",
            {
              fill: "deepskyblue", stroke: null, strokeWidth: 0,
              desiredSize: new go.Size(28, 28)
            }),
          $(go.TextBlock,
            new go.Binding("text"))
        ));

      // define the Link template to be minimal
      myDiagram.linkTemplate =
        $(go.Link,
          { routing: go.Link.Orthogonal, corner: 5 },
          $(go.Shape,
            { stroke: "gray", strokeWidth: 1.5 })
        );

      // define the Group template to be fairly simple
      myDiagram.groupTemplate =
        $(go.Group, "Auto",
          {
            layout: $(ParallelLayout, { layerSpacing: 20, nodeSpacing: 10 })
          },
          $(go.Shape, { fill: "transparent", stroke: "darkgoldenrod" }),
          $(go.Placeholder, { padding: 10 }),
          $("SubGraphExpanderButton", { alignment: go.Spot.TopLeft, "ButtonBorder.figure": "Rectangle" })
        );

      var model = $(go.GraphLinksModel);
      model.nodeDataArray = [
        { key: -1, isGroup: true },
        { key: -2, isGroup: true },
        { key: -3, isGroup: true },

        { key: 1, text: "S", category: "Split", group: -1 },
        { key: 2, text: "C", group: -1 },
        { key: 3, text: "Longer Node", group: -1 },
        { key: 4, text: "A", group: -1 },
        { key: 5, text: "B\nB", group: -1 },
        { key: 6, text: "Another", group: -1 },
        { key: 9, text: "J", category: "Merge", group: -1 },
        { key: 11, text: "T", category: "Split", group: -2 },
        { key: 12, text: "C", group: -2 },
        { key: 13, text: "Here", group: -2 },
        { key: 14, text: "D", group: -2 },
        { key: 15, text: "Everywhere", group: -2 },
        { key: 16, text: "EEEEE", group: -2 },
        { key: 19, text: "K", category: "Merge", group: -2 },
        { key: 21, text: "U", category: "Split", group: -3 },
        { key: 22, text: "F", group: -3 },
        { key: 23, text: "Medium\nTall\nNode", group: -3 },
        { key: 24, text: "G", group: -3 },
        { key: 25, text: "AS", group: -3 },
        { key: 26, text: "H\nHH\nHHH", group: -3 },
        { key: 27, text: "I", group: -3 },
        { key: 29, text: "L", category: "Merge", group: -3 },
        { key: 101, text: "0", category: "Split" },
        { key: 107, text: "ABCDEFG" },
        { key: 109, text: "*", category: "Merge" }
      ];
      model.linkDataArray = [
        { from: 1, to: 2 },
        { from: 2, to: 3 },
        { from: 3, to: 4 },
        { from: 4, to: 9 },
        { from: 1, to: 5 },
        { from: 5, to: 6 },
        { from: 6, to: 9 },
        { from: 9, to: 11 },
        { from: 9, to: 21 },
        { from: 11, to: 12 },
        { from: 12, to: 13 },
        { from: 13, to: 14 },
        { from: 14, to: 19 },
        { from: 11, to: 15 },
        { from: 15, to: 16 },
        { from: 16, to: 19 },
        { from: 21, to: 22 },
        { from: 22, to: 24 },
        { from: 24, to: 26 },
        { from: 23, to: 29 },
        { from: 21, to: 25 },
        { from: 25, to: 23 },
        { from: 21, to: 27 },
        { from: 26, to: 29 },
        { from: 27, to: 29 },
        { from: 101, to: 1 },
        { from: 19, to: 109 },
        { from: 29, to: 107 },
        { from: 107, to: 109 }
      ];
      myDiagram.model = model;
    }
  </script>
</head>
<body onload="init()">
<div id="sample">
  <div id="myDiagramDiv" style="border: solid 1px black; background: white; width: 100%; height: 500px"></div>
  <p>
    This sample demonstrates a custom <a>TreeLayout</a>, ParallelLayout,
    which assumes that there is a single "Split" node that is the root of a tree,
    other than links that connect with a single "Merge" node.
    The layout is defined in its own file, as <a href="ParallelLayout.js">ParallelLayout.js</a>.
  </p>
  <p>
    Both the <a>Diagram.layout</a> and the <a>Group.layout</a> are instances of ParallelLayout,
    allowing for nested layouts that appear in parallel.
  </p>
</div>
</body>
</html>